What specific models of each brand are you referring to ?? (I ask because equal price doesn't mean equal Amp Hour capacity)
Everstart batteries are wet cell ..... Vmax batteries are AGM
How many amps does your trolling motor pull per hour ??
Note: battery amp hours are listed as how many hours it will run at 1amp/hr draw.
*tip -- if you go with Everstart, don't go with the Maxx series. Their AH rating is lower (114ah) than the regular Everstart 29series (122ah).