No, McGregor wins this easy.
K.O. first or second round.
On what basis do you see McGregor beating Poirier faster than Khabib beating Poirier? Is that because of Poirier's hip surgery last year? Or maybe you think it's a stylistic match-up? Maybe 2014 is in your head. If I had to guess, the Cowboy fight is in your head. Cowboy was washed up. The UFC fed McGregor a tomato can [in the form of an aged fighter] because he is a cash cow.
Your prediction may come true, but I'm just curious why you think that. Because what you are saying is McGregor is better than Khabib, and that's not true.
Anyone betting money on UFC fights should use some form of objective reasoning to do so.