Convoy L6

Have received a convoy L6 and the old led fried and was looking for a upgrade xhp70.2 but might be a weird question but what’s the difference between a 6v led to a 12v ? What does my light need to do the upgrade TIA

Functionally no different, just how they are wired internally since the XHP70.2 has four led elements within it.
6V = 2S2P, 12V = 4S1P
More in Series, more Amps it needs to drive. More in Parallel, more Voltage.

For the L6, the 6V will be fine, just need to make sure ya got a decent driver, some spring bypasses and high current switches at the tail