Might be a little more durable, but durability isn't an issue with quality add on magwells so that doesn't really matter. I'm not a fan of the Caspian as I don't compete and it's a bit bigger than I care for.
I have a gun with the race ready frame and it works great for carry and competition. The Caspian frame isn't larger than one with a magwell but the opening is larger and smoother than a Smith and Alexander type. If you are going to do competition I would suggest the Dawson Ice.
I use my 45 for IDPA CDP with the Race Ready frame and have shot the Western States Single Stack match with it. I had a Race Ready frame on my 40 and milled the bottom of it to put a Tech Well on. Now I run Dawson Ice magwells on my Single Stacks but am currently building a lightweight Race Ready framed commander for a carry gun.
So for competition the Dawson Ice, for carry the Race Ready.
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