They can look very similar because eachindividual may not necessarily be a "perfect" representation of theirbreed --and in some cases,Netherlands have beencrossed with the Polish.
The coats should be very different -- the Polish have a coarser smooth flyback coat.
The Polish have a finer bone and don't have the Dwarf characteristicsof the Netherland. (The well rounded head and very shortears) The Polish should have a full head, but it is notrounded in all directions.
There are chocolate Netherlands, but it is a far more common color in Polish.
Pam