Asus was not in the running w/ Z97. I had some serious issues and performance was uniformly lower than the competition in performance test comparisons. Z87 also had some major issues, especially in the early steppings. I know this well from having two of them still in use. First was the bug whereby external SATA devices would not awake when PC came out of sleep mode. The 2nd problem was a bug whereby the BIOS clock would freeze w/o your knowledge resulting in new driver being unable to b loaded as date were newer than the frozen system date. Both problems were commonly posted on Asus VIP forums. The C2 stepping on the RoG boards eliminated the 1st problem but the promised BIOS fix for the clock issue was never delivered.
As to the performance, Asus was a distant 3rd to MSI and Gigabyte w/ Z97 ... The "Gaming 5" boards from MSI and Gigabyte were were the big sellers of that time.
The most common competitively priced model was the Asus Z97-A, looking at that against the MSI Gaming 5 (Giga was virtually identical)
-MSI was 21 % faster in fps in above chart
-MSI supports faster memory .... wasn't a big deal then, no one was likely be using 3000+ anyway at that time
-MSI has more SATA ports (6 vs 4) ... significant
-MSI has better audio (ALC 1150 versus ALC 892) .... very significant
-MSI has better LAN port .... significant for on line gaming
-MSI has 4 more USB ... significant for gamers with potential mouse, KB, speakers, headset , throttle, flight stick, head mouse, external HD, smartphone, BT adapter.
Note that newegg has 30% negative reviews (1 or 2 eggs) on the Asus board and only 18% on the MSI.
While Asus showed considerably slower performance with Z97 / Z87, It must be noted that before Z87, they usually had the performance edge ... since Z170 tho, no brand has shown a significant edge performance wise... Asus just had a rough patch with those two generations. There's little difference between brands since then performance wise.
Interesting side fact ... I always liked the WS boards because they came with a higher level of TS and premium RMA service ... they shipped you a new board and after you installed it, you sent old one back. Well the new one arrived shaped like a banama ... it was so warped, the I/P section could not even be forced into the case opening... at the top, it completely missed the opening ... bend was 1.3 inches
It took 3.5 months for me to get a working board. If you remember, this was back in the day when Asus spun off ASrock so they could address the low end builder market w/o harming their rep. AsRock then became part of Pegatron. Well all RMA emails back and forth ***for my Asus WS board*** came to / from Pegatron