Hartke 2.5 XL & Hartke Pro2100

I am making some consideration about both Hartke 2x10" cabinets, model 2.5XL & model Pro2100.
I am interested since I would appreciate a standalone cabinet with decent portability.
From a certain standpoint the 2 cabinets are comparable. I mean:
quite compact design with 2 10 inch alluminium speaker.
Pro 2100 is appealing to me since it is rated at 4 ohm instead of the 8 ohm of the 2.5XL which makes the Pro2100 more as a standalone unit, same goes for the vertical design (even id the 2.5XL can be played vertically.
I know the 2.5 quite well but the Pro2100 here is not so common and I do not have the chance to try before buy.

Do you have an experience on how the 2 cabinets compare as standalone unit?

Ps I use an Hartke HA3500 head.