Welcome to the Strelets Forum.
Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets.
If you have any questions about our products then we will answer them here.
Not Napoleonic, but I use Newline 20mm Boers alongside the original Strelets Boers.
The figures in the original Strelets Boers varied in size, but the Newline figures are about the same size as the smaller Strelets figures.
I use Newline's Egyptians alongside Strelets' Bashi Bazouks, and they look fine together.
I will try and get some at the next show I go too and see what they look like.
Newline designs Napoleonic figures are stocky similar in style to Strelets old sculpts but a bit shorter 20-22mm (measuring from sole of foot to top of head usually half way up shako).
Hagen Miniatures I have Belgian, Dutch, Bavarian, Scots Grey Cavalry and French and Dutch Infantry all are very nice but a bit on the large side 25mm-25.5mm there are exceptions their Spanish Artillery I have are 23mm and mix very well.
Franznap I have Austrian Hussars, Austrian and Bavarian Artillery all are 23mm and mix really well.
All Metal figures are quite expensive when compared to plastic figures with Newlines being cheaper than most metal figures but all of the above will have offers or consider doing deals if you email them.
As nice as the Metal guns are I decided to save money and use plastic guns for my Artillery and you could always convert your plastic figures to make a desired unit.
The 20mm are smaller, but stick a bit of card to the base and they sit well enough (tried and tested with the Colonials).