ASAs failover pair which design is the best

Guys
I am designing the firewall solution. I have 2 ASA with 2 Switches. Please see the diagram design1 and design2. Let me know your thoughts. Design 1 uses a stacking cable with 2 switches but in a diagram it is represented as one due to lack of diagram availability. Design 2 uses 2 switches connected seperately. What are advantages of one over the another.?
Thanks in advance.

By all means you can use a switch to interconnect both ASAs and it is not achieving anything different from using a cross-over cable for the purpose of deploying a state-full failover.
I have deployed at least 15 state-full failover ASAs over the course of 14 years of network career just by using a cross-over cable.  If you weight pros and cons using a switch vs the cross-over cable.  I would say cross-over cable have more pros than con and this is my take.
Nothing against Cisco but sometime Cisco recommendation also comes with sales and marketing strategy.
"Each interface should connect to a switch port so that the link status is always up"
So does the cross-over cable and there is an additional point of failure by a switch coming in between ASA and a switch that sending statefull sync data to standby ASA.
Thanks   

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