(Denim head) Anecdata - buying Levis from Amazon (or any other store), pick up at least a couple of pairs in the same size. It's likely different people/factories making them, but often you'll find variation in size/denim even when the labelling in the same. One pair of 32/32 might feel 'off' and the next is the best pair you've ever owned. Completely agree with going 'smaller' brand if you want consistency though (and that's a whole different world).
But better tip - (if you're not looking for 'smart' denim) buy from eBay. Only buy pairs where everything has been measured properly (waist, inside leg, rise, etc) so you can get close to what you know you fits. You can find 20+ year old Levis for less than $20 - the denim is heavier, the quality is good and they have that perfect 'broken in' feel that makes the jeans feel like your best friend. Plus you can afford to try a few pairs to find ones you love.
But better tip - (if you're not looking for 'smart' denim) buy from eBay. Only buy pairs where everything has been measured properly (waist, inside leg, rise, etc) so you can get close to what you know you fits. You can find 20+ year old Levis for less than $20 - the denim is heavier, the quality is good and they have that perfect 'broken in' feel that makes the jeans feel like your best friend. Plus you can afford to try a few pairs to find ones you love.