I don't understand the point of these more expensive imported H6 and H8 batteries (which Advance didn't even stock up until a couple of years ago). I can get either a group 48 for $89 or so, or I can get an H6 for almost $140. The difference is that the H6 is about 3/8" taller, but has less CCA and similar reserve capacity.
Likewise, you can get a group 49 battery for $89 which will fit in place of that 49H8 battery which costs nearly $40 more.
Both Advance and Autozone's catalogs say that my 2006 Saab 93 takes the H6 battery, but they used to say that it takes a group 48 battery (which is, as mentioned, almost $40 cheaper). The Saab dealer replaces the battery in that car with a group 48 under warranty.
I guess if you have to have a battery with fold-down handles that looks like the OEM one, maybe you'll pay the extra $40?