It probably comes down to your style preference in the end ,here are a few key details.
The Grace pattern includes 2 sleeve lengths short & long length.
This pattern also includes a rashie top length.
The Grace suit features 1 extra panel at the sides.
This pattern is a very versatile pattern with more variations.
The Gina pattern is a closer fit then the Grace pattern.
It is cut closer to the body. Its intended to be a little tighter then the Grace suit.
The Gina pattern includes 1 style of sleeve Cap sleeve.
The Gina pattern includes extra panels at the front & back.
Both patterns share the same collar & chunky exposed zip front.
The sleeves on both patterns can be interchanged, all 3 sleeve lengths of the 2 patterns will fit both the Grace & Gina pattern.
The Gina pattern is great for mixing many colours together & the Grace pattern will show of that lovely print more.