Having both types of ports gives you more flexibility, and the traditional 5-pin MIDI DIN ports let you directly connect two MIDI devices together without needing to use something else (e.g., a computer) as a go-between. Thus, for a MIDI controller-- be it a keyboard controller, "launch pad" controller, foot controller, breath controller, etc.-- having traditional MIDI ports is preferred if you have any intentions of ever connecting the controller to a synth, arranger keyboard, portable ROMpler, or other type of sound module.
The other thing that displeases me from buying the roland is the size of the keys, they seem or actually are a bit smaller than a conventional keyboard... Would this be uncomfortable?
The keys on the Yamaha are also a tiny bit narrower-- not enough to notice, but enough to make the 61-key keybed about 1/4 of an inch narrower than standard. That shouldn't have any impact on your playing, though.
I have a PSR-E443 (as well as a PSR-E433 and a YPT-400) and enjoy it very much, so I wouldn't want to steer you away from it if you're thinking of getting one. However, its overall build quality, sound quality, and technical capabilities aren't as good as what you'll get from a PSR-S or other mid-to-high-end Yamaha model-- e.g., the PSR-E and DGX models use XGlite rather than XG, so they can use some but not all of the XG MIDI commands that the PSR-S models can; and the PSR-E and DGX models are also limited to just two auto-accompaniment style variations (A and B), whereas the PSR-S models can use four variations (A, B, C, and D). Also, there's no way to load new voice samples on the PSR-E and DGX models. Furthermore, the PSR-E models have lower polyphony than the PSR-S models-- 32 notes max, or 16 notes for some voices, and even less if you layer two voices together.
On the other hand, the PSR-E443 is less than half the price of the least-expensive PSR-S model, so if money is an object for you (as it is for me), the PSR-E443 might be good for you. And if you connect it to a computer (since it has a USB port rather than MIDI DIN ports), you can use it as a MIDI keyboard controller, although it doesn't have all the assignable knobs, sliders, and pads that some controllers do. I have a number of sample libraries, virtual instruments, and soft synths that I've purchased on sale over the years, so I'm not limited to just those voices that the PSR-E443 has. And I have a couple of "launch pad" controllers I bought when they were on sale, as well as a keyboard controller (from before I bought a PSR-E433) that also has plenty of sliders, knobs, and pads.
To conclude, I recommend that you visit a local music store and play a PSR-E443 firsthand if possible, to help you decide whether you think it does or doesn't meet your needs as far as build quality, sound quality, etc. And if none of your local stores have one available to try in store, you could even try a PSR-E353 or PSR-E253 instead, as their build qualities and sound qualities are similar to the PSR-E443's. To be clear, I'm not suggesting that you buy one of them instead, just that playing them in store ought to give you a sense of what the PSR-E443 sounds and feels like.
