Apples and oranges,, you won't have to constantly check your axle nuts for buying a different battery.
In my case, my torque arms were too loose to make running regen all the time worth it. And 2% back on a trip to Walmart that used 5 ah was not saving me much, when the bike carried 33 ah.
So it was not worth it,,, FOR ME, with the exact setup I had. If there was a 15% grade hill to go down on the way to Walmart, then I would have demanded regen, and improved my torque arms to have it. Because of the slower rpm motor I had on the bike, cogging alone slowed me to where I never overheated my brakes, on any grade under 8%.
2% back on a tour that used all of that 33 ah, would be priceless of course, but I really seldom used more than 25 ah on any given ride. 5% back even better. AS ALWAYS, the question of is anything worth it, depends on your needs.
In my case, not much chance to use regen, on a road that is over 50 miles long without a stop sign the whole way. Around town, I never came remotely close to needing that 2% more. And my disc brakes lasted fine, since I rarely was stopping from all that fast a speed anyway. When I'd go to the mountains, the dd motor would limit my speed to about 30 mph, and I would not be riding those brakes at all. A faster wind dd motor would have had me riding the brakes. But on the mountain, descending at 5 mph was not my style either, so even when I had regen, I rarely used it on a mountain, till the first stop sign.
Regen that limited me to 20 mph down a mountain would have been used, but I did not have that. I had 5 mph, or nothing.