@suicideneil
. TXS: 3 ported OEM axial nitro motor (not the 8 ported axial spec2). No big difference in power output though.
. TXS: only the front axle is equipped with universal joint shafts, rest are dogbones (the mantis rtr has universal joint shafts all around).
. TXS: Less accessory -> no additional clutch bells, ...
You can consult the manuals online to compare both versions:
.
Mantis rtr manual
.
Mantis txs manual