Is better sx1276, sx1272, ... or sx127x driver/drivers

[sytabaresa]

Hello, I'm interesting to use sx1272 in my projects, I have 2 mbed boards and some ismt transreceivers with this chip. but I not sure if is better option create a new driver sx1272 or enhance the actual driver sx1276 and rename to sx127x for this new device, because these are very similar except in a few registers. what do you think? (sx1272 and sx1273 all function identically).