Feature comparison

Effect Block Count in Different Axe-Fx Products
Effect	Standard	Ultra
Noise gate	1	1
Gate/expander	-	2
Compressor	2	2
Multiband compressor	-	2
Drive	2	2
Amp simulator	2	2
Cabinet simulator	2	2
Chorus	2	2
Quad chorus	-	2
Flanger	2	2
Phaser	2	2
Rotary cabinet	2	2
Wah-wah	2	2
Filter	2	4
Formant filter	1	1
Graphic equalizer	2	4
Parametric equalizer	2	4
Crossover	-	2
Delay Looper Stereo diffusor	2 - -	2 2 2
Multi-delay Quad-series delay 10-tap delay 10-tap rhythm-tap delay Diffusor	2 - - - -	2 2 2 2 2
MegaTap delay	-	1
Reverb	2	2
Pitch shifter Arpeggiator Custom scales Arbitrary custom shifter map Faster pitch detection Pitch corrector	1 - - - - -	2 2 2 2 2 2
Synth	-	2
Vocoder	-	1
Ring modulator	-	1
Resonator	-	2
Stereo enhancer	1	1
Pan/tremolo	2	2
Volume/pan	1	4
Mixer	2	2
Effects loop/aux out	1	1
Feedback send/return	1	1

Additional Ultra features

[Ultra]

• 20% faster DSP plus 6X more memory.
• More sequencer steps (16 instead of 8)

The Axe-Fx Standard is limited by the amount of memory on board to the existing feature set. Effects can be updated, with new controls and tweaks being added, but expansion is highly unlikely. The Ultra has much more room for growth. Cliff has stated his intention to keep the quality of the effects, especially the Amp & Cab sims, the same in both processors. Thus the Standard isn't an "inferior" or "outdated" product, it simply has a more specific feature definition.