Ok, so the Mark X uses the same engine as the IS250 - but what's
your point? Are you equating the Mark X to the IS250? If yes, you
are also saying that the Lotus = Toyota because it uses a Toyota
Celica engine?
Just to let you know, I have tested both the Mark X and the IS250
and you can feel the diiference immediately when you sit inside the
IS250. Totally plush and luxurious. The IS250 comes with better
contoured seats, softer leather, MUCH better sound insulation,
Vehicle Stability Control and Traction Control, paddle shifts,
13-speakers Pioneer sound system, air-conditioned seats at the
front (WOW!) etc etc... And on top of that, great looking car with
the powerful 'L' badge. So you'll know why you want to pay $30k
more for the IS250, which I did.