cat or jd

Hello
I'm looking to buy a mini excavator to use on my land and for rent
I would like to have your opinion between :

Jd 35d 2009 4600 hours
rubber track (new)
30000$ (can)
and
cat 304 cr 2003 3200 hours
steel track (original)
32000$ (can)

I know that the 2 machines are not exactly the same size but I would like to know the
force and weakness of those 2 mini excavator

Thanks

cat or jd