you´re welcome! And if you prefer buying new it´s also understandable, second-hand market brings more interesting options, but it´s also more cumbersome, and takes time. And it´s also nice to have a new guitar.
On the ABETO versus CEDAR, you really need to find it for yourself. To find out, you should go to a store, compare the same type of guitar with different woods, and try to capture the difference and ask yourselves which one you like better.
Improvement potentials is not in my view really a criteria, eg CEDAR is supposed to be straight at the top of its potential (although some player say if you play the guitar often it has a positive impact for cedar as well), while ABETO might take time to reach full potential, but this is merely about the timing of when the guitar is at full, an will not tell you which one you prefer. Of course, if the plan is to have a guitar and sell it in 6 months, then you know that you will have a guitar at full potential during six month, while this would not be the case for abeto. Still you might prefer abeto.
Note that if you buy abeto second hand then the guitar has developped already. However, mind the years of construction, as even if the guitar was built by a great luthier, if you get one of his first the guitar is likely not to be comparable with those he/she has built after years of experience. The name is not all, the date also matters.
Lastly, regarding difference between cedar and abeto, typically cedar is warmer and louder, but with less clear separation of the voices and less brightness. This means that your choice can also be commanded by your repertoire: if you want to play baroque musique with contrepoint, then perhaps having voice separation is better.
Furthermore, getting a nice sound is also harder, on average, for abeto than for cedar, because it requires more capacity to control the sound (cannot explain you why, but this is connected to the wood structure). But once you can control, the experience is often reported as more rewarding. To give an example, Dyens has spent many years only swearing with abeto, but in his late life was playing on cedar because he just didn´t want to have to make so many efforts to control the sound. He wanted to just play and enjoy.
Also, cheap cedar top sound better than cheap abeto top. So if you go abeto you should go for quality - but with your budget you are fine.
So, in a nutshell, for a beginner cedar top is likely more commandable than abeto, however it´s all about taste and for this one you should definitely spend some time trying the sound and see which one you like more.