So which flash would be better with the full gauntlet?

SM Flash

or

FFJL52 Flash

and why?

sm flash imo. he has an extra click which has regen, better support powers, time jump thru the dial, an toughness. the other has a better ss but you can still get hit hard if u miss it and with a full ig you may have ss with the sm flash every time if youre lucky.

The best flashes are white lantern and kc flash... They outclass any other.

WL Flash, obviously, but, to answer the actual question:

FFJL52 Flash is much better when you are factoring in a full Gauntlet.

Why?

The Trait Super Senses on a 4 + is drastically superior to the extra click of life on the Superman Flash. Having the opportunity to evade attacks 1/2 of the time outright is incredibly potent. He starts with a 19 DEF vs. Ranged, which, in itself, is very good. Since he has a long reach with HSS, most of the attacks coming toward you will be ranged attacks by necessity, and a smart player will avoid melee confrontation.

Now...

The SM Flash is good, but his role is definitively support-based. His ability to hop right where he's needed, smack Wanda, and then rush out, is very very good. It's what he was made for. He wasn't made for a full Gauntlet. FFJL52 Flash was.

-nihil