Well, alright then... Bilaskhani Todi and Salagavarali are similar only in the first half, and that too only in the arohan (SrgP). After that, they are quite distinct.
1. Bilaskhani has a madhyam (shuddha), Salagavarali does not.
2. Bilaskhani has a komal dhaivat, Salagavarali has a shuddha dhaivat.
3. In Bilaskhani, if you do a pancham, you have to go up after that, you *cannot* do a Pg ; in Salagavarali, you can do a Pg (the sequence is often used in the descent).
4. In Bilaskhani, in the avarohan, you typically do a "Srnd" instead of Snd. In Bilaskhani, you can do a SnD.
Quoting from
https://www.parrikar.org/hindustani/todi/:
The basic aroha-avarohana set of Bilaskhani may be stated as:
S r g P d S”::S”, r” n d, P, d n d M g, r g r S
For Salagavarali it is:
S r g P D n D S”::S” n D P g (P)r g, r, S
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)