65 per cent of Red Dead Redemption's sales in the UK since release have been on Xbox 360, GfK-ChartTrack has told CVG
35 per cent of sales of the title were on PS3.
Disney's Split/Second was also 360-led, with 56 per cent of sales on Microsoft's system.
The title hit No.1 in GfK-ChartTrack's UK All Formats chart this morning.
GfK-ChartTrack wouldn't speculate on whether the PS3 stock shortages affected the sales. CVG revealed last week that the title was unavailable on Sony's console across the UK on launch day.
"It's the biggest title of the year so far and assuredly 360-led," GfK-ChartTrack director Dorian Bloch told CVG this morning.
"It's the second No1 for Take Two in one year - after Bioshock 2. It's also the first Rockstar all-formats No.1 since GTA IV, which hit the top spot in week 18 back in 2008."