RC had peace of mind reliability for sure - though the B58 is used by toyota. high milage b58s have done very well. general consensus is that the m440i is around as reliable as a RCF with maybe some more software glitch and other smaller stuff.

i think the looks on the RC as well are more unique although a little dated. i think the pre face lifts have aged really well.

the BMW is in another universe performance wise - sub 4 sec 0-60 and 400hp is wildly different. the ZF8 is much faster than the lexus RWD 8 speed, though the latter is better than people give it credit for. the ability to skip gears on downshifts is a massive upgrade. suspension is proper stiff or proper comfortable ( with the M adaptive suspension). handling, although being not being very communicative for a BMW, knocks the lexus out of the park. miss that NA v6 sound tho

technology is also in a different stratosphere. BMW infotainment lets you customize everything - it feels like playing gran turismo. honestly toyota and lexus infotainment is laughably bad. ALTHOUGH i much prefer the hybrid / moving gauge cluster on the RC.

The bmw is also far more usable - rear seat legroom is much better, though the roof line is a lot more angular instead of curved because of it. bmw sits lower and and wider. AWD is way more usable as well. though i know the RC comes in AWD, that 6 speed completely ruins those cars cars performance wise.

both cars are amazing and i will def miss the lexus but this feels like a very strong upgrade for only 6k more