what is the largest on base percentage to batting average difference in a single season with a minimum of 500 at bats

Babe Ruth has the best on-base percentage with 500+ at-bats in a season, with an on-base percentage of .545 in 1923.

Interpreted as:

What is the largest on base percentage to batting average by a player difference in a single season with a minimum of 500 at bats?

	NAME	OBP	AVG	AB	SEASON	TM	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Babe Ruth B. Ruth	.545	.393	522	1923	NYY	152	151	205	45	13	41	130	170	4	93	17	21	699	399	99	3				.764	1.309	211	124.7	.571	230	120.4
2	Billy Hamilton B. Hamilton	.521	.403	558	1894	PHI	132	198	225	25	15	4	90	128	9	19	100		702	292	44	7				.523	1.044	209	81.9	.495	157	76.2
3	Babe Ruth B. Ruth	.513	.378	529	1924	NYY	153	143	200	39	7	46	124	142	4	81	9	13	681	391	92	6				.739	1.252	193	109.2	.549	210	102
4	Babe Ruth B. Ruth	.512	.378	540	1921	NYY	152	177	204	44	16	59	168	145	4	81	17	13	693	457	119	4				.846	1.359	214	127.8	.575	224	118.7
5	Rogers Hornsby R. Hornsby	.507	.424	536	1924	SLN	143	121	227	43	14	25	94	89	2	32	5	12	640	373	82	13				.696	1.203	175	96.7	.537	221	95.9
6	Joe Kelley J. Kelley	.502	.393	507	1894	BAL	129	165	199	48	20	6	111	107	5	36	46		638	305	74	19				.602	1.104	194	78.6	.502	159	71.1
7	Hugh Duffy H. Duffy	.502	.440	539	1894	BSN	125	160	237	51	16	18	145	66	1	15	48		616	374	85	10				.694	1.196	203	91.3	.526	169	80.7
8	Ted Williams T. Williams	.499	.356	522	1942	BSA	150	141	186	34	5	36	137	145	4	51	3	2	671	338	75	0			12	.648	1.147	168	96.2	.524	209	86.5
9	Ted Williams T. Williams	.499	.343	528	1947	BSA	156	125	181	40	9	32	114	162	2	47	0	1	693	335	81	1			10	.634	1.133	170	91.3	.508	207	86.2
10	Ted Williams T. Williams	.497	.342	514	1946	BSA	150	142	176	37	8	38	123	156	2	44	0	0	672	343	83	0			12	.667	1.164	166	95.8	.525	214	87.5
11	Ted Williams T. Williams	.497	.369	509	1948	BSA	137	124	188	44	3	25	127	126	3	41	4	0	638	313	72	0			10	.615	1.112	156	81	.504	184	68.8
12	Babe Ruth B. Ruth	.495	.373	534	1931	NYY	145	149	199	31	3	46	162	128	1	51	5	4	663	374	80	0				.700	1.195	181	98.6	.525	206	95.1
13	Babe Ruth B. Ruth	.493	.359	518	1930	NYY	145	150	186	28	9	49	153	136	1	61	10	10	676	379	86	21				.732	1.225	192	97	.517	204	100.6
14	Ted Williams T. Williams	.490	.343	566	1949	BSA	155	150	194	39	3	43	159	162	2	48	1	1	730	368	85	0			22	.650	1.141	182	95.5	.511	187	82.2
15	Billy Hamilton B. Hamilton	.490	.389	517	1895	PHI	123	166	201	22	6	7	74	96	7	30	97		629	256	35	9				.495	.985	167	63.2	.471	157	61.2
16	Tip O'Neill T. O'Neill	.490	.435	517	1887	STL	124	167	225	52	19	14	123	50	5	20	30		572	357	85					.691	1.180	191	96.4	.525	190	88.9
17	Rogers Hornsby R. Hornsby	.489	.403	504	1925	SLN	138	133	203	41	10	39	143	83	2	39	5	3	605	381	90	16				.756	1.245	173	94.1	.540	208	90.1
18	Norm Cash N. Cash	.487	.361	535	1961	DET	159	119	193	22	8	41	132	124	9	85	11	5	672	354	71	2	2	19	16	.662	1.148	168	88.3	.488	194	79.5
19	Ty Cobb T. Cobb	.486	.369	563	1915	DET	156	144	208	31	13	3	99	118	10	43	96	38	700	274	47	9				.487	.973	143	71	.467	184	64.2
20	Babe Ruth B. Ruth	.486	.356	540	1927	NYY	151	158	192	29	8	60	165	137	0	89	7	6	691	417	97	14				.772	1.258	195	109.9	.545	212	104.8
21	Tristram Speaker T. Speaker	.483	.388	552	1920	CLE	150	137	214	50	11	8	107	97	5	13	10	13	674	310	69	20				.562	1.045	152	74.9	.483	170	62
22	Jesse Burkett J. Burkett	.482	.405	555	1895	CLE	132	153	225	22	13	5	83	74	8	32	41		644	288	40	7				.519	1.001	172	65.6	.473	152	57.2
23	Harry Heilmann H. Heilmann	.481	.403	524	1923	DET	144	121	211	44	11	18	115	74	5	40	9	7	626	331	73	23				.632	1.113	155	78	.503	189	73.3
24	Edgar Martinez E. Martinez	.479	.356	511	1995	SEA	145	121	182	52	0	29	113	116	8	87	4	3	639	321	81	0	4	19	11	.628	1.107	152	72.5	.469	182	68.8
25	Billy Hamilton B. Hamilton	.478	.366	524	1896	BSN	131	153	192	24	10	3	55	110	2	29	83		642	245	37	6				.468	.946	155	56.7	.456	146	47.1