Awesome topic @Zee!
My understanding is that CAT-T or SOFTT-W are the “best”. SWAT-T and RATS are kinda alternatives that fill a niche. SWAT-T has the benefit of being able to fold flat and also act as a pressure bandage. The RATS is super easy to tuck into places you wouldn’t normally be able to stash a tourniquet, and also good for smaller limbs (children, pets). I use RATS or SWAT-T in my EDC, but CAT-T for wherever I keep a “larger” medical kit (car & home). YMMV…
Bottom line though, is all of these are way better than nothing. I think in the olden days, you had to worry about tourniquet usage, but in today’s modern medicine there is very little downside (as long as you can get to a hospital in reasonable timeframe).
I agree with @Fizbin and @Sidecarr9 with recommendations for Dark Angel Medical and MyMedic. Both have really nice kits at a variety of price levels for different purposes.
If you’d like to EDC just the bare minimum I’d recommend you take a look at the POCKET D.A.R.K. “MINI” TRAUMA KIT by Dark Angel Medical, it has a SWAT-T, QuickClot, gloves and duct tape in a 3mil vacuum sealed pouched (extra thin and small). You can “upgrade” to include a pouch or swap the duct tape for a real chest seal. IMO, keep the cost down by choosing the basic model and buy several. You can combo the duct tape and the 3mil pouch into an improvised chest seal if needed, but YMMV on that.
I dunno about MyMedic, but Dark Angel has 10, 15, 20% off coupons fairly frequently if you sign up for their mailing list.