Shimano 105 v SRAM Rival

Any thoughts on advantages/disadvantages of each? Looks like the bike I'm getting will be SRAM equipped...I was quite looking forward to getting a "flight deck" computer...or is it a bit of a gimmick?
What's this "double tap" thing SRAM are on about? Plenty of references to it on the website but it does not actually tell you what it is!
Are they equivalents or is one groupset a bit better?
Thanks!
What's this "double tap" thing SRAM are on about? Plenty of references to it on the website but it does not actually tell you what it is!
Are they equivalents or is one groupset a bit better?
Thanks!
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TBH I've only had a teeny couple of hundred yards ride on a friend's Shimano equipped roadie and although I liked the Shimano system I did find it a bit odd that the brake lever moved...so hopefully I'll like the SRAM system...
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