both different items wor 

suica is just a convenient way to board trains without lining up to buy tickets each time round.
JR pass is another thing altogether.
since i would like to do good in this thread.
I would advise, if you would be only going around Tokyo and Hakone area.

Suica + Hakone travel pass is enough.

JR pass never pays off if you dont roam far enough cross country.

You only need JR Pass if you travel out of Tokyo then back to Tokyo i.e. Osaka, Kyoto, Nagoya, Nagano, Gifu...
If you are not going to these place, then your JR pass would not pay off...