If it is opinion, it does not belong in a tutorial. Same goes for reviews. Tutorials should be pretty non-controversial and hard fact.
The 'Opinions and Experiences' section is for your experiences with parts or sellers, and reviews definitely fit here as a discussion thread.
'Which one should I buy' tends to be a bit of a hot topic, and very hard to do accurately. One size does not fit all. I'd suggest either running it past the mod team before posting, or posting a discussion thread asking for comments in the relevant section before posting it as a tutorial.