Yes, it is of interest. However, Chance and Fiesta Glass Ltd did make hundreds (thousands?) of different promotional items for many years and with a minimum order quantity of 250, it wasn't that expensive for a local church/village/organisation/event/[fill in to suit] to purchase a quantity and knock them out at a profit. Companies would also buy them as gifts for customers.
I have no idea how many of the Pilks trays there are, but they do crop up occasionally, although the one (say) depicting my local church has only appeared once that I know of. So whilst the local church is almost certainly 'rarer', it is of considerably less interest to anyone except a local, whereas the Pilks one would interest anyone who worked/works there or is researching some part of its history, etc.