join loft

Hi everybody!

I have trouble in my model. I have two loft with different profiles. I have curves, which are on a sphere, I used perp frames, then I oriented the profiles, and I lofted them. 

As you can see on the attached pictures there is are spaces between the two loft, and I should join them. So the profile of the grey part should totally connect to the light part.

Has anybody any idea, how can I solve it? 

Thanks