Here's the answer:
“这个更好看”
(zhègè gèng hǎokàn)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- zhè gè gèng hǎokàn
- zhè gè gèng hǎo kàn
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 93.12% of the time!