It seems to literally be the same technique, except she's targetting only WT1/PRAME/Survivin. Trials TAA-T have going are for Hodgkin's lymphoma/DLCBCL, Relapsed/Refractory Hematopoietic Malignancies, Acute Myeloid Leukemia and MDS, and brain tumors.
Only lymphoma trial is in combination, and all trials are P1, primary completion 2023, with brain tumor primary completion at 2020
I don't see how it wouldn't elicit epitope spreading as it's exactly the same technique. She's only targetting a few different tumors, but using only the same 3 antigens.