I'm not familiar with Aim Loan. Those may be teaser rates or the providers may be incompetent. Or they may be real and valid.
Lenders may very well want to pull your credit if you apply for a loan. They may be willing to give you general comments based on your credit score. They are required to get your permission in order to do a hard pull. Each hard pull can subtract anywhere between a few and a dozen points, depending on your overall credit history. It seems that the longer and stronger your history, the less a hard pull affects your score.
Usually loans are priced in bands, so if you're between 700 and 749 you'll get the same rate, 750 and above might get you a better rate, 650 to 699 a worse rate, etc. Lenders may have different break points.
It's been a while since I've needed a loan, but I think bankrate.com used to be good and reputable.
Nobody knows what rates will do in the future, especially in the short term.