Hi OP, I don't own either but have driven the 2017 Macan (base not S but with some options, post-FL) and 2015 RR Evoque (base; not Velar) so here's my 2 cents, most of which are subjective but hopefully some are helpful:

Macan vs Evoque:
- interior - prefer the way its laid out in the Macan and it feels more well put together.. i also like the seats in the Macan more because its more "sporty". the Evoque had some wrattles even at low speeds, but maybe the issue is limited to that unit
- infotainment - not much between the two, imo they're both mediocre when compared to user friendliness of iDrive or MBUX...but maybe now theyve made quantum leaps
- ride comfort - Macan less comfortable, probably thanks to the lower profile RF tires
- drive - this is where the Macan shines so much more, especially in sport mode... the gearbox kicks down so much faster than the Evoque. Macan's acceleration is well taken care of thanks to the 2.0T VW engine, the Rover felt sluggish.. and imo Porsche has done a great job at making the SUV feel less "SUV-like" especially around corners
- image and brand prestige - for sportiness go for Porsche, for gangster go for Rover...both will put you way above the plebs like me
- reliability - all these are anecdotal but GENERALLY: "german engineering (or over-engineering)" gives you great ride, driveability, initial quality and everything else at the expense of long term reliability (parts cost more, parts dont last as long). FYI, the owner of the Macan kicked up a fuss and replaced the entire steering rack (noises when turning) and gearbox (shuddering) under warranty (standard 4 years for Porsche Malaysia)... had to wait for months for the parts to arrive, although its worth noting that the car was still driveable

A note about Porsche being a glorified VW/Audi and Lexus being a glorified Toyota.. reality is that the buyer of the Porsche or Lexus is partly paying for the brand prestige.... FYI, the previous and current generations of Mercedes A-class (i think A200 and below) uses an engine that Mercedes "co-developed" with Renault - pretty sure most consumers do not care what is under the hood as long as there's a 3 pointed star upfront. If you want a Porsche with a Porsche engine, look at the sports cars and sedan lineup... not the SUVs

Anyway, at budget of RM500-600k the world is your oyster....test drive all the SUVs in that vehicle class and also look at SUVs a class above the Macan like maybe the XC90 or RX350 (i think Cayenne is not in that budget range) and consider all the pros and cons of each against the other before you put your money down. cheers!