Kind of! Basically yes.
What you don't want for a LiFePO4 battery - as far as I know - are the highest voltage peaks of a lead-acid smart charger. Too high voltage can hurt LiFePO4 cells. Most all car/bike battery chargers will output that kind of pttern and can damage LiFePO4 batteries. (Incindentally, EarthX do have some overvoltage protection, but I'm fairly sure you'd never want to charge them with a lead-acid smart charger anyhow.)
In the charging system in the bike that doesn't happen as the voltages don't go that high, so it all works out there.
All in all it's worth it to have a dedicated LiFePO4 charger imo.
Although LiFePO4 essentially don't need maintenance charging like lead-acids do. That is to say they don't self-discharge like lead-acids do. Much much slower at least. However it can be a hassle to be chargerless so I'd always have one on hand.
I'm kinda interested in this thing:
RDX1 AC/DC Battery Charger/Discharger | HITEC RCD USA
It'l basically charge any battery you might have around for whatever purpose.
Hope this helps and isn't too muddled
