> I really liked how you tackled this, have you thought about this approach? I would slightly rephrase it like this: I liked your approach, because (reasons),

> I really liked how you tackled this, have you thought about this approach? I would slightly rephrase it like this: I liked your approach, because (reasons), though I believe there’s a better one, because (reasons). If you put it this way you show that you actually understood the approach and not just saying “do it my way”. It gives the opportunity to learn something and it invites to a discussion - “hey, I thought about your approach but I decided to use mine because…”