Yes i used that test, and also i used the Manifest utility included in Qram 2.02.
i took two screenshots.
The first is From Toshiba and the Second from GW-286CT GEAR using the SCAT chip emulation developed by Gratpsycho. In the Toshiba there is no Mappeable memory.
This mappeable memory is the ´large page frame', this memory is backfilled and managed by the EMS 4.0 chipset.
Here is the explanation of what I read and understood from old pc magazines from late '80i avaiable in google books and the book DOS beyond 640kb.https://archive.org/details/DOS_Beyond_640K_2nd_edition
The mappeable memory can be 'moved' from conventional to EMS and from EMS to conventional memory directly by EMS 4.0 chipset. The CPU reuses the space same addresses to write different portions of memory and calls to the EMS board/chipset when the portion of memory have to be switched and other written portion must be called.
(in the 286 GEAR the area from 4n00 to An00 is mappeable this means that area can be reused several times by CPU and when a memory block is switched, the actual adress of the code or data is stored by the EMS chip).
This is the same is done with the 64kb page frame located at E000 or D000 but in the EMS 3.2 spec only one page of 16kb can be moved per clock cycle. In the EMS 4.0 the four pages (64kb) can be moved, but if the EMS 4.0 memory board and/or chipset support the 'large page frame' also the entire 384kb memory block of the backfilled conventional memory can be 'moved' modifing the registers of the memory board instead of moving the actual data.
Without it, only 64kb of executable code can be stored in the EMS memory because only the 64kb page frame can be used. Of course you can use all the EMS memory to store data, but it still limited to 64kb to store executable code.
Some applications such as Deskview and Windows 2.x, and Windows 3.0 when runs in real mode can 'move' the mappeable area of the conventional memory back and Forth the EMS memory.