The M300 series are the lightest and the E500's are the all in one but much heavier.
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
2	M300	M300	PROPN	NNP	Number=Sing	3	compound	3:compound	_
3	series	series	NOUN	NN	Number=Sing	6	nsubj	6:nsubj	_
4	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	cop	6:cop	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	6:det	_
6	lightest	light	ADJ	JJS	Degree=Sup	0	root	0:root	_
7	and	and	CCONJ	CC	_	12	cc	12:cc	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	_
9	E500's	E500	NOUN	NNS	Number=Plur	12	nsubj	12:nsubj|17:nsubj	_
10	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	12	cop	12:cop	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	12:det	_
12	all	all	DET	DT	_	6	conj	6:conj:and	_
13	in	in	ADP	IN	_	14	case	14:case	_
14	one	one	NUM	CD	NumForm=Word|NumType=Card	12	nmod	12:nmod:in	_
15	but	but	CCONJ	CC	_	17	cc	17:cc	_
16	much	much	ADV	RB	_	17	advmod	17:advmod	_
17	heavier	heavy	ADJ	JJR	Degree=Cmp	12	conj	12:conj:but	SpaceAfter=No
18	.	.	PUNCT	.	_	6	punct	6:punct	_
