I need to take a later flight from Chicago to Venice in business on Feb 7th.

I have the 2 options :

Chicago - Copenhagen SK 944 2205-1320+!
Copenhagen - Venice SK 2691 1710-1910

or

Chicago - London UA 938 2100-1105+1
London - Frankfurt LH 905 1230-1505
Frankfurt - Venice LH 330 1650-1810

SK only have 1 flight ORD-CPH each week. If the flight is cancelled due to bad weather, I might need to re-issue my RTW ticket.

I would appreciate your view on this.