I bought a KTM brand oil filter and a K&N brand oil filter to compare them. Both are for my 2013 KTM 35 EXC-F.
Interestingly, they appear identical, except for the color of the fabric and the box packaging. They are the same dimensionally, have the same metalwork and the same number of fabric pleats. They are also both made in Thailand. The K&N has red fabric and the KTM has orange fabric. I cannot test the quality/function of the fabric but it looks the same to me.