You'd have less adhesive to worry about removing if you'd use a heat gun.Removing the emblem is the easy part. Its getting the adhesive off afterwards that's the hard part.
Ive debadged tons of cars and never used a heat gun. Does it work better? Maybe? I don't know, but I never had much trouble without one.
What I would do is take some, wd-40, or something similar and spray behind the emblem to soak the adhesive a little bit. Wait 5-10 mins. Then put some gloves on and cut a piece of fishing string. Rock it back and forth behind the emblem until it pops off. (wear gloves so the line doesn't rip in to your skin, Also fishing line is MUCH stronger then dental floss, I tried dental floss and you had to be so gentle it would of taken me hours.)
Once the emblem is removed getting the adhesive off is the tough part. I soak it with wd-40 wait about 10 mins, then come in with a dry microfiber towel and scrub away the adhesive. Repeat this as many times as you need until its gone.
Couple pro tips. Tape all around the adhesive with painters tape so you don't mar any of the well kept paint while trying to remove the adhesive.
Also if you have a microfiber pad, you can use that and some cutting compound to remove stubborn adhesive. (After you've removed the majority of the adhesive) don't use a cutting pad on a giant mound of adhesive. Also after you do this the cutting pad with be garbage, you wont be able to get that crap out of the pad.