I've been doing more looking at the various sculptural or see-through vases, and there is definitely an ES version out there that is almost identical to some of the Roth shapes. Unfortunately, I haven't seen a bottom shot or gotten a form number yet. The Roth versions are all in the 2000 (2002-2006 that I can think of) line and with red or reddish clay. On the Roth versions, the top opening is sometimes round, sometimes rectangular, though I don't know why. Other companies seem to have stuck with the square or rectangular opening exclusively or almost exclusively.
Forrest