They're probably the exact same chance. Also, they'll be 100% at first, and 4% more per equipped same-element Sub-Eidolon (up to 120%). They'll be buffed to 120% base very late this year (up to 140%), like 11 months from now.
In other words, those things are nothing special until their buff.
They'll be 100% + 5% per LB + 4% per same element eido in sub at start.
After buff they'll be 100% + 5% per LB + 8% per same element eido in sub.
First one (wind) should arrive here with event after the next one (Monocerus/Unicorn raid).