Steve,
The Mullard is a great tube and is no slouch, but the bass is not up to the Tungsram in my opinion. The tungsrams bass is top notch. This may be due to the fact that the tube is a little laid back in my system. Has a great balanced presentation, but it's one flaw is that it can sound a little too warm in my system. I have Premier 16LS, Premier 8A's, Sony X7ESD which I use as a transport only, a Dodson DA-217 MK II D, Eggleston Andras. All cabling is Cardas Golden Reference. The Mullards seem to have a little more sparkle and the classic Mullard midrange. To tell the truth I interchange both depending on my mood.
Hope this helps,
JOhnny