@J3172722126 For engineering Penn is better. Also I am pretty sure Yale does not offer a computer engineering major (only computer science I think) and in general its engineering offerings are more limited. On the other hand Yale has an overall more prestigious name, but that doesn’t translate to any practical differences in opportunities, especially given that for your area of interest Penn has an edge and Penn is pretty prestigious itself. Also Yale has the more traditional ivy league hogwats-like campus.
Here is an article about Yale computer science you might want to read: https://www.bloomberg.com/news/articles/2015-03-06/want-a-job-in-silicon-valley-after-yale-good-luck-with-that
I also faced this same dilemma a few years back. I ended up choosing Penn for two reasons. First I felt i fit in there much better and secondly I thought that the engineering offerings were better and I was also interested in business.
If I had gotten into Harvard, Stanford or Princeton I would have probably chosen one of them based on how i thought at that time (was quite prestige-driven at the time as many high schoolers are ), but I felt Yale’s engineering offerings were not what I wanted, and also Yale didn’t have any business offerings and so the extra prestige was not worth it in that case since Penn was also a prestigious school and I felt I fit in at Penn much better.
In terms of what applicants choose most, overall the edge goes to Yale, but it is not a big difference, and it largely varies what ones intended major is. It is not uncommon for Engineering and Wharton kids to turn down Yale for Penn, for liberal arts/sciences majors it is a bit more rare but it still happens some times.
Here is an estimate of how cross-admits choose (this is not 100% accurate but gives you good idea). As you can see the difference is not statistically significant and not that big and is primarily driven by liberal arts majors. You will notice that the split is much less pronounced than that of Penn vs Harvard, Stanford, MIT, Princeton and it is probably for the reasons mentioned above (Penn in general has better pre-professional offerings than Yale and also some equally strong lib arts majors).
All of that said, however, I still believe you should go where you fit in best. Both schools are excellent and it is much more important for your personal happiness and also for you to thrive as a student, to go where you like the community and vibe/atmosphere best.
Did you visit both/either?