Multiple biquads vs higher order filtering I've heard that you can stack biquads on top of each other to get the same (or similar) effect as higher order filters.

For instance a biquads is order 2, so putting something through 3 biquads is like an order 6 filter.

I've heard that doing this is more numerically stable than an actual order 6 filter.

I was wondering though, besides increased numerical robustness, are there any differences between doing this compared to just using a higher order filter?

Does it impact processing speed or frequency response or anything else?

For some context, this for audio synthesis for electronic music, on a modern desktop computer, using 32 bit floating point math.
A cascade of 2nd order biquadratic (biquad) sections is a commonly used approach for  implementing higher order FIR/IIR filters in fixed point systems (Once you determine that you need an IIR filter, this would be a topology to consider). A big consideration for the biquad structure is stability: higher order IIR filters are prone to instability in fixed point systems due to coefficient rounding combined with long feedback delay paths (causing poles to go outside of the unit circle). The absence of any feedback between the individual cascaded sections (decoupling the poles and zeros between sections) results in a more stable structure that will be less sensitive to coefficient quantization.
I do not know of other advantages, but the numerical robustness is a very serious consideration especially  in higher order structures (and fixed point systems).