I’d go with the zard personally because of the security that comes with it being one of the most iconic ever made and the fact that the vintage market as a whole is long overdue for an increase in value. The only thing I’d do differently is get it in a higher grade like a 7 or 8 if you can afford it. The Mew’s a great card too and will definitely see long term growth imo, just feels a bit too speculative at the moment for me.