Okay, the Stearns I like is the I650 Stearns® VR™ Versatile Rescue, mostly because it's set-up with webbing to take a helo hoist. The Stearns-SOSpenders Inflatable Nomex Vest you chose looks more comfortable (a good thing), but note that it's only authorized for use in aircraft that have no requirement. Does it have leg straps?

If I get one it will probably be the Switlik Special Operation Vest because of the purpose built pocket for a HEED bottle in addition to the gear pocket found on their Helo Crew Vest.

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Better is the Enemy of Good Enough.
Okay, what’s your point??