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first Geekbench benchmark of one of the new iPad models (11,2) surfaced shortly after Apple's announcement, confirming a 2.49GHz clock speed, identical to the iPhone's clock speed. The benchmarked iPad also features 3GB RAM, 1GB less than the iPad Pro and 1GB more than the 9.7-inch iPad. 3GB RAM is also the amount of RAM in the iPhone XR, while the XS and XS Max feature 4GB.
At this point in time, we don't know if iPad 11,2 is an iPad mini 5 or a 10.5-inch iPad Air, but given the similarity in specs between the two tablets, we suspect that both models are using the same clock speed and RAM.