It is about 60 days ahead at most and it doesn't matter because the hard cap of 21 million coins is till the same. This has gotta be the dumbest argument I've ever heard.
The hard cap is the same until it isn't -- when Bcash has to hard fork to infinite inflation in order to incentivize mining because fees won't supplant the mining reward.
Explain to me what will incentivize mining on Bcash when the fees are too low compared to Bitcoin? The mining subsidy, by design, is eventually supplanted by transaction fees.
As it says, "Block height. BCH is currently ahead by 9272 blocks." with the block height of both being about 500k.
In fact, with the rate that BTC gains hashing power, and its comparatively less responsive difficulty adjustment algorithm, it is expected to overtake BCH's block height in the next couple of years.