I have the U-2200's now and they have done OK over the years despite being boiled have dry on a regular basis by the old WFCO converter. Water usage is much less and float charging much better with the new PD4660.
So Costco lists the weight at 63 lbs, which is in between the Interstate GC2-RD at 62 lbs and 208 aH and the GC2-HD at 64 lbs and 216 aH. The GC2-XHD is listed at 65 lbs and 232 aH.
I'm hoping that 208 vs 232 aH won't turn out to be an issue, but I am hoping that faster charging with the PD4660 and the fatter wires to the batteries will make up for that.
I would suspect that at this price point, they are the RDs and not the HDs but one can always wish....
These generally got good reviews so I figured for the money I would give them a try.