Assuming you get the same coverage plan, all agents will give you the same quote.
It all comes down to customer service. I personally signed up with Karl Marshall in Scarborough.
State Farm requires pictures of your bike and a picture of the vin#, it was early march when I signed my policy and couldn't ride the bike because it was still cold out.
Karl drove from Scarborough to my house in Ajax, took whatever pictures he needed and got me a pink slip the same day.
He also assured me that I could get insurance with SF, where a dozen of other agents said I didn't qualify because I only had 5 year experience since the date of my G1, they thought it changed to 6 years and didn't bother to check with head office to see what the new criteria is.
Overall, Karl went above and beyond to make sure that I was able to ride my bike this summer and I often refer people to him because his service is simply the best.
If you need his contact info, you can look him up on here, his handle is "Karl Marshall"
Cheers.