Reliability XC90 vs. V70 (II)

Hello, I fluctuate between a V70 P26 and an XC90 (1). I would like to operate both with an LPG system. What could be problematic with the XC90: All-wheel and automatic – with the V70 I would take one with a manual transmission and front drive (probably the 2.4 with 140 hp). With the XC90 you have no timing belt but a (hopefully) durable control chain. Who knows what it looks like with the spare parts supply, repair vulnerability and the general reliability of the two models? Greetings and thanks already Stefan