2SK301 as replacement for 2SK170?

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2SK301 as alternative to 2SK170?

I have some 2SK301 jfets by Matsushita (Panasonic), datasheet attached. Class R, 5 to 12 mA IDSS. Would they be suitable for use in a unity gain buffer like the Pass B1?

There are differences in electrical characteristics compared to 2SK170, but I don't know how significant these differences are. For example, gm (Yfs) is lower than the 2SK170 - would this mean more noise at unity gain? The noise figure (NF) is low, but is only given at 100Hz, not 1kHz as for the 2SK170.

I would appreciate some advice, not being knowledgeable on jfets. If I am comparing chalk with cheese, I will assign them back to the drawer where they have lain for many years.

Sorry, I should have said "alternative", not "replacement" in original title, i.e. to use in a new circuit.
 

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