The Short Version
If you train alone and you squat or bench press heavy, get the RML-390F. The safety bars will save your life (or at least your pride) when you miss a rep. If you have a training partner, limited space, or you mostly do Olympic lifting, the SML-2 is a perfectly capable stand that costs $200 less and fits in tighter spaces.
Safety Is the Real Question
Let me be blunt about this. If you bench press alone with any real weight, you need safety bars. You can get creative with dumping the bar off your chest, sure, but that gets old fast and eventually something will go wrong. The RML-390F gives you proper safety pins (or optional safety straps, which are even better) that catch the bar when you fail. You set them just below your chest height, and you can push hard without worrying.
The SML-2 does have optional spotter arms you can buy separately. They work reasonably well for squats. For bench press, they are a bit short and not as confidence-inspiring as a full cage. I used spotter arms on a squat stand for about a year before switching to a rack, and while nothing bad happened, I always felt like I was working around a limitation instead of having a real solution.
If you always train with a spotter or you primarily do movements where bailing is easy (front squats, overhead press, cleans), the SML-2's lack of a full cage matters a lot less.
Space and Footprint
The RML-390F is a flat-foot rack, which means it does not need to be bolted to the floor. That is a huge advantage for garage gyms. But it still takes up a meaningful chunk of space. The footprint is about 49 inches deep by 53 inches wide. Once you add a bench inside and room to load plates, you are looking at a roughly 8 by 8 foot area minimum.
The SML-2 is only about 48 inches deep by 49 inches wide, but the real space savings come from the fact that you can push it against a wall when you are not using it. You cannot really do that with a full rack. For a single-car garage gym where you also need to park a car sometimes, the SML-2 is a much more practical choice.
One thing people overlook is ceiling height. The RML-390F comes in at about 90 inches tall. If you have a standard 8-foot ceiling, that leaves you only 6 inches of clearance. Strict pressing inside the rack with a bar overhead gets tight. The SML-2 sits lower at about 92 inches but because it is open on top, you can press freely without worrying about hitting crossmembers.
Accessories and Expandability
This is where the RML-390F pulls ahead significantly. Because it uses the Monster Lite hole pattern on four uprights, you can bolt on a massive range of accessories. Dip attachments, landmine posts, plate storage horns, matador hip attachments, band pegs, and more. Rogue's accessory ecosystem for the Monster Lite line is enormous. Your rack can grow with your training for years.
The SML-2 is more limited. You can add spotter arms and a few basic attachments, but with only two uprights and no crossmembers, you cannot hang anything off the sides or rear. No pull-up bar is included either, though you can buy a separate one. If you like the idea of building out your setup over time, the rack gives you a much better foundation.
Build Quality and Feel
Both are made from 3x3 inch 11-gauge steel with 5/8 inch hardware. They feel equally solid. The SML-2 does not wobble or flex under heavy squats. I have reracked 400+ pounds on one without any concern. The RML-390F feels more planted simply because it has four posts and weighs more, but the SML-2 is not flimsy by any stretch.
Rogue makes both in Columbus, Ohio. Same steel, same powder coat, same quality control. You are not getting a lesser product with the squat stand. You are just getting fewer features.
The Price Gap
The RML-390F runs about $695 and the SML-2 about $495. That $200 difference is real money, but consider what you get. Four uprights instead of two, included safety pins, a pull-up bar, and access to dozens of accessories. On a per-feature basis, the rack is actually the better value. The SML-2 wins on pure entry cost, though, and if you do not need those extra features, saving $200 to spend on plates or a barbell makes a lot of sense.
My Recommendation
For most home gym owners who plan to train seriously for years, I would point you toward the RML-390F↗. The safety features alone justify the price difference if you train alone. Add in the accessory options and the fact that your setup can evolve without replacing the rack, and it is the smarter long-term buy.
The SML-2↗ makes sense if you are tight on space, tight on budget, or you primarily do Olympic lifts where you bail forward anyway. It is a great piece of equipment. But if you can swing the extra $200 and you have the room, the rack is almost always the right call.
Both are available direct from Rogue with free shipping on qualifying orders.