"Buttery" Bags...

Gustto is very soft, Bulga is buttery, BUT it is also easy to stain, mark up, scratches, etc. Deerksin and buffalo leather can also be very buttery, and with their pebbled leather, is not as delicate as a Bulga.
Honestly, what is your price range?
If you're going to use it all the time, you may want to consider going with a top designer brand that will deliver the leather you want.
If not seeing IRL, then you should order from someone who has a great return policy.
Hope this helps.