quad cortex vs Line 6 Helix Floor

Hello my first post

Would really appreciate the help,  I can't decide on which one to buy
Line 6 or the quad cortex the main sound I am looking for is the
Pink floyd "David gilmour" tone. I've watch many YouTube videos
There are lots on the line 6 but not so many on the cortex,
What would you consider the best? For this tone