I'm comparing this against the amazing 1, flower power and charming smile (all Satisfyer dildos I've accumulated through this site's frequent sales), and this is my favourite. The power / strength and type of vibration all feel similar, so the difference is in the silicone shape & size.
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Insertable dimensions: 3.4-3.6 diameter x 15 cm length. Idk what the tiny rise/slope is meant to do. The charming smile (shorter but has a similar slope)'s description says it's meant as a rabbit part for gentle clitoral stimulation. I've tried canting / angling both vibrators and still can't figure out how the slope is meant to contact clit while vibrator is inserted. Both are still pretty good dildos anyway, the motor is fairly strong though they run out of battery when in use in 1-2h, so I do like having a few on hand.