The Thrasher 27" Jet Boat (also fits V3) Stainless Steel Exokeel option will perform like the stock Thrasher 27" Jet Boat Exokeel but with a higher wear resistance to damage from shallow rocks and significant impacts with other objects. There is theoretically a slight handling difference from the added weight and flat intake grate, but few people have mentioned this to be noticeable.
The advantage of the stainless steel exokeel is that it can take very hard hits from higher drops onto pointed rocks with less damage than the standard thermoformed exokeel.
The tradeoffs of the stainless steel exokeel are that it is 144g heavier and the intake grate does not have any formed scoop in the mid length section like the stock intake grate does. Most have said that they do not notice any difference in performance, but these are some notable tradeoffs.