In how to treat them, no. But commercial will pay more.
Cold calling is the number 1 way of getting storefront and commercial. The key is to get them on a schedule.
Storefront is usually the lowest price. You’ll probably be looking at $2-2.50 per pane inside and out and you’ll need a $15-20 minimum. Routes and scheduling are VERY important. But you’re also looking cleaning them every 2 or 4 weeks. Note that I said “4 Weeks” NOT monthly. There are 13 - 4 week periods in a year. And you want to be able to line up your 2 week jobs with the 4 week jobs which help your routes. Try to sell every 2 weeks for busy stores and restaurants and every 4 weeks for offices, automotive shops, or less busy stores.
I usually bid commercial with the same pricing as storefront. $2 first floor, $3 second floor (no ladder), $4 third floor etc. Commercial usually has more glass. So instead of driving from job to job, you can camp at a single job for half a day or day and make good money. I love hotels. I try and sell commercial every 4 or 8 weeks. Large commercial might want it only once or twice a year (hotels)
Oh, and I might pad the estimate based on my own experience. Just because a large commercial rings up at $800 doesn’t mean it’s not going to take me $1000 worth of time.