I voted for Jennica- I agree with Nikki, that Jennika seems a little harsh... but also, I might pronounce them a little differently:
Jennica: JENN-ih-cah
Jennika: Jeh-NEE-ka
Although, I guess they SHOULD be pronounced the same, since the name Annika is pronounced AH-nih-cah, not Ah-NEE-kah, but when I see "Jennika", I hear it in my mind as Jeh-NEE-kah...
Jennica seems much softer. Jennika is a bit harsh.
-Nikki
I voted for Jennica- I agree with Nikki, that Jennika seems a little harsh... but also, I might pronounce them a little differently:
Jennica: JENN-ih-cah
Jennika: Jeh-NEE-ka
Although, I guess they SHOULD be pronounced the same, since the name Annika is pronounced AH-nih-cah, not Ah-NEE-kah, but when I see "Jennika", I hear it in my mind as Jeh-NEE-kah...
Best of luck!