Why does Splenda have a stronger taste than Sugar?

One thing I noticed is that 1 packet of splenda, which is about 1/2 a tbsp, is stronger than the same amount of sugar. Why is this so?
Sucralose is an artificial sweetener that is 400–700 times sweeter than sugar [1, 2, 3]. A smaller amount of Splenda is needed to reach your preferred level of sweetness than sugar [2]. It has a strong taste because it is so much sweeter than sugar. Artificial sweeteners are synthetic compounds designed to produce the intense sweet taste you observe in artificially sweetened drinks [3]. In fact, the sweetness of artificial sweeteners is many times that of sugar [3]. Splenda is made in the lab and processing plants [4]. It primarily made of sucralose, which leaves the body as waste [4]. The process of digesting Splenda goes in and out of our system without changing its chemical structure and offering no nutritional energy [4].
Artificial sweeteners like sucralose are compounds that have been found to elicit the same "sweet" flavor we get from sugars, but they do so with much less intensity. [2] For example, Splenda is about 450-650 times sweeter than sugar. [1] Because of this, a small amount of Splenda can be used to achieve the same level of sweetness as a larger amount of sugar. [1] Additionally, the receptors on our tongue that detect sweetness are not very sensitive, and only detect sugar in large quantities. [4] However, artificial sweeteners randomly fit the receptor better and trigger the receptor with far smaller quantities of the material. [4] As a result, a packet of Splenda may taste stronger because it contains more of the actual sweetener and less filler. [4]