Geometry is a bit harder then Algebra I believe. I learned Algebra in 7th grade and went to Algebra honors in 8th and Geometry Honors as a freshmen. Geometry I struggled a lot. And had to retake 1st semester in summer =\.
I find them both pretty easy!
I would prefer geometry though because its easier to remember then algebra (don't know why).
Geometry was so hard for me. Algebra, on the other hand, was ridiculously easy (in comparison). Trig was harder too. It's all about how your mind works.
Equations were easier than abstract ideas for me.