We upgraded one of the batteries in the toy hauler this past spring when the old one fried itself on the trickle charger over the winter. So far so good. Ours is the blue top, but we didn't put a whole lot of thought into it...we just needed a battery. I'm not even sure what the difference is. We've also got a red top automotive battery that's performed great as well.
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR