Like yourself, last year I was offered seasonal part time positions at both Macy's and at Target (first at Macy's, then at Target). There was a brief two-week period in which I had two jobs, but ultimately I went with Target because it was a shorter commute from home and school (3 miles vs. ~10), and I felt that it had a more laid-back atmosphere.
At Macy's, I was there long enough to undergo orientation, training, and three days of work. It was my first foray into retail and it was challenging for me. Although the same is true for both stores, I felt that at Macy's I was especially pressured to always be doing something, whether it be engaging customers, doing go-backs, etc. A Sales Associate at Macy's is basically the Target positions of Sales Floor, Cashier, and Service Desk rolled into one. After three days of long shifts in dress clothes and dress shoes (a killer for 8hr shifts), when I went for orientation at Target I immediately felt more comfortable in a red T-shirt, khaki pants, and regular shoes. Although this may seem like a minor difference, for me it was big. Also, Target started me out at 0.10 more an hour than Macy's. And finally, I felt more engaged doing Hardlines at Target than dealing with clothing for hours at Macy's.
In the end, I don't regret sticking with Target. First it was a relief that I didn't have to work the insane Macy's holiday hours last year. And I felt that the more casual atmosphere of Target was a better fit for me, and even though my TM discount is less than at Macy's, I actually use it on a regular basis.
I do miss some things from Macy's. Working at a mall, lunches were more fun for me since I got to go to the food court and go shopping at other stores. Also I miss the self-scheduling. Although it was tough, I liked being able to work 20+ hours JUST from working on weekends.
Overall though I'm happy with things ended up, and I hope you will be too 🙂