Is TP-Link Archer A5 v4 the same as Archer C50 v4?

The list of OpenWRT-compatible routers says that Archer A5 is supported only in version 5:

There is no information about compatibility of the version 4.
On the other hand, the TP-Link website offers strictly the same firmware for C50 V4 and A50 V4

Both files are identical.
The C50 V4 is supported:

Are those models really identical? May I install the OpenWRT dedicated for C50 V4 on A5 V4?

The strange thing is that there is a newer firmware for C50 V4: but there is no such newer version for A5 V4...

TIA & Regards,

The funny thing about the official firmware in A5 V4 is that it has the ssh active, however it does not allow to log in:

$ ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 admin@ 
admin@'s password: 
PTY allocation request failed on channel 0
shell request failed on channel 0

The first error may be omitted by specifying the "-T" option. However even specifying the command does not eliminate the second one:

$ ssh -T -oKexAlgorithms=+diffie-hellman-group1-sha1 admin@ /bin/sh
admin@'s password: 
exec request failed on channel 0